Sure you can use wood. I would like to know what the scales are made of though. If they are horn, bakelite,ect. you may opt for acrylic wedge material instead. Look in the wiki to see how to make one. It's not very difficult. If you don't have a belt sander just do it on a piece of sandpaper on a flat surface. I use carpet tape to afix it to my index finger. Good luck.